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'[EE:] Which FileSystem to use on CompactFlash card'
2003\12\18@223654 by Lucas Hartmann

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Hello.

I heard few days ago that Microsoft is now taxing the FAT filesystem.

I'm designing new hardware intended to save lots of data on a CompactFlash
card. I could create a new filesystem, but that wouln't be interesting since
I'd be unable to read the card in any other hardware.

The question is: Which FileSystem to use on CompactFlash cards?

I though of using ext3, but a quick look in google brough me lots of info,
but nothing about implementation.

More info on application:
PIC18F452 @ 32MHz

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2003\12\18@224524 by Ken Pergola

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Lucas Hartmann wrote:

> I heard few days ago that Microsoft is now taxing the FAT file system.
> The question is: Which File System to use on Compact Flash cards?


Hi Lucas,

You might want to look into the Microchip File System (MPFS) -- just do a
search on their web site.

I've personally have not used it, but it's worth investigating...

Best regards,

Ken Pergola

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2003\12\18@230430 by Russell McMahon

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Read the thread on this list on the subject.
The licence is for use of long file names implemented as uSoft did it. If
you are using standard 8+3 files names it doesn't apply.

> I heard few days ago that Microsoft is now taxing the FAT filesystem.
>
> I'm designing new hardware intended to save lots of data on a CompactFlash
> card. I could create a new filesystem, but that wouln't be interesting
since
> I'd be unable to read the card in any other hardware.

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2003\12\19@005848 by Josh Koffman

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Lucas,

For some reason, your emails are showing with a date in June 2003. If
you could look into this, I'm sure there would be a lot of people who
would appreciate it.

Josh
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Lucas Hartmann wrote:
<snip>

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2003\12\19@031450 by Amaury Jacquot
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Lucas Hartmann wrote:
> Hello.
>
> I heard few days ago that Microsoft is now taxing the FAT filesystem.

only if you use the "long file names" feature.

still, fat is not good for flash, as it tends to allways clobber one
particular block that contains the head of the FAT itself.

> I'm designing new hardware intended to save lots of data on a CompactFlash
> card. I could create a new filesystem, but that wouln't be interesting since
> I'd be unable to read the card in any other hardware.
>
> The question is: Which FileSystem to use on CompactFlash cards?

it's easy. the best file system for flash (one that has been designed
for flash use) is Jffs2

documentation is available here :

http://sources.redhat.com/jffs2/

> I though of using ext3, but a quick look in google brough me lots of info,
> but nothing about implementation.

no, ext3 does not really fit the bill, as it has the same flash killing
flaws as fat

> More info on application:
> PIC18F452 @ 32MHz
>
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